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Earnings Per Share | 12 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Earnings Per Share | 11. Earnings Per Share Set forth below is a reconciliation of the numerator and denominator for basic and diluted earnings per share calculations for the periods indicated:
Year ended December 31, |  | 2016 |  |  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | $ | 87,472 |  |  | $ | 62,126 |  |  | $ | 38,628 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of common shares outstanding – Basic |  |  | 18,931,415 |  |  |  | 18,696,659 |  |  |  | 19,367,928 |
Dilutive effect of options and restricted stock units outstanding under the Company’s employee compensation plans |  |  | 118,100 |  |  |  | 668,420 |  |  |  | 469,480 |
Weighted average number of common shares outstanding – Diluted |  |  | 19,049,515 |  |  |  | 19,365,079 |  |  |  | 19,837,408 |
The dilutive effect of outstanding options and restricted stock units is calculated using the treasury stock method. There are no anti-dilutive stock options in 2016, 2015, and 2014 because the closing price of the Company’s stock on December 31, 2016, 2015, and 2014 exceeded the strike price of all outstanding options on that date.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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